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发明名称
Elevator and table support for drill pipes
摘要
申请公布号
US2362042(A)
申请公布日期
1944.11.07
申请号
US19420458980
申请日期
1942.09.19
申请人
ABEGG & REINHOLD COMPANY, LTD.
发明人
ABEGG WALTER A.
分类号
E21B19/07
主分类号
E21B19/07
代理机构
代理人
主权项
地址
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